■ functional characteristics of transformer characteristic parameter tester

▲ three phase short circuit impedance measurement: display three-phase voltage, current and power; Short circuit impedance (zk), short-circuit reactance (XK), short-circuit inductance (LK) and short-circuit impedance voltage (zke), the percentage of impedance voltage converted to rated temperature and rated current of transformer and the error percentage with nameplate impedance are automatically calculated.

▲ measurement of single-phase short-circuit impedance: in addition to measuring the short-circuit impedance of single-phase transformer and the error percentage with the nameplate impedance, it also measures the impedance, reactance, resistance and inductance of transformer, which is convenient for user data comparison.

▲ measurement of zero sequence impedance: the measurement of zero sequence impedance is applicable to the transformer with star connection and neutral point on the high voltage side. The instrument can record zero sequence impedance, zero sequence reactance, zero sequence inductance, impedance angle and zero sequence resistance.

▲ load loss test: it has the function of low-voltage equivalent load test of three-phase transformer, and judges the performance of transformer by comparing the change and symmetry of load current and load loss of each single phase.

▲ no load loss test: it has the function of no-load test of three-phase transformer. By analyzing and comparing the no-load loss of each phase, observe the distribution of no-load loss in the iron core of each phase, find out whether there are local defects in the magnetic circuit of winding and iron core, and judge whether the iron core structure of transformer is loose. It is not only an auxiliary method to judge whether the product is qualified or not, but also an effective method to find faults.

▲ it can be measured directly within the allowable measurement range of the instrument. If it exceeds the measurement range, an external voltage transformer can be connected. The instrument can set the transformation ratio of the external voltage transformer to directly display the applied voltage value.

▲ the instrument adopts large screen color high-resolution touch LCD, Chinese menu and Chinese prompt, which is easy to operate.

▲ the instrument is equipped with 232 interface, which can expand the function, and has its own printer, which can print and display data.

▲ built in non power down memory, which can store 500 groups of measurement data, and is equipped with U disk interface for accessing test data.

■ technical parameters

▲ basic range

Voltage input: measurement range 1V ~ 660V measurement error: ± (reading) × 0.2% ± 0.05% (range))

Current input: measurement range: 1mA ~ 110A, measurement error: ± (reading) × 0.2% ± 0.05% (range))

Power: cos Φ ＞ 0.1 measurement error: ± (reading) × 0.5% ± 0.05% (range))

0.02 ＜ cos Φ ＜ 0.1 measurement error: ± (reading) × 1.0% ± 0.05% (range))

Frequency measurement: 45 ~ 65 (Hz) accuracy: ± 0.003hz

Phase measurement: 0.00 ° ~ 360 °, accuracy: ± 0.1 °

Short circuit impedance: 0 ~ 99%, measurement accuracy: ± 0.5

Instrument display: 5 digits

▲ extended range

The voltage and current can be expanded to any required value through the transformer, and other parameters can be adjusted automatically according to the magnification of the transformer.